The sum of two times a number and 5 more than the number is the same as the difference between -15 and twice the number. What is the number?

asked Mar 4, 2018 196k views

4 votes

by TLJ

5.9k points

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6 votes

(2x)(x+5) = 2x-15

4x^2 + 5x = 2x-15

4x^2 = 7x -15

16x = 7x - 15

16x + 15 = 7x

2 2/7 + 2 1/7 = x

x = 4 3/7

Jstar answered Mar 9, 2018

by Jstar

5.5k points

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